Supports: racks – Elements
Reexamination Certificate
2001-04-04
2003-07-01
Stodola, Daniel P. (Department: 3634)
Supports: racks
Elements
C211S180000, C211S191000
Reexamination Certificate
active
06585122
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to material-handling systems, and more particularly to safety netting that contains product on overhead shelves and that protect workers and customers below in the aisles.
2. Description of Related Art
Shelves and racks are a convenient way to store items, and stored many levels high such can maximize floor space. A typical warehouse retail store like The Home Depot has pallet racks that are two, three, and four levels high. Heavy items, like backup store inventory on a pallet, are placed and fetched from high above by a forklift.
Heavy items placed ten to twenty feet high above aisles in pallet racks and on shelves can present a significant and not-so-rare personal injury risk. Shaking, bumping, and poorly stacked items can come tumbling down and hurt people below, or at a minimum damage the product.
Not surprisingly, a number of different devices and methods have evolved to address these problems. The Law too has entered the picture with OSHA regulations, and personal injury lawsuits. New company procedures, union work rules, and plain common sense now dictate that an effective restraint, barrier, or guard system be installed on the higher shelves and rack to prevent falling debris.
As could be expected, some methods and devices are better than others. Conventional safety products can be expensive to buy, and difficult to work with or install. A simple netting secured all around the shelf opening can be effective if the netting is strong enough and secured well. But the way the netting is secured and constructed can mean opening the net to access the shelf is made very difficult, in some cases requiring a technician to climb high above and use hand tools to open and/or close the net.
Sinco/Sala (Middletown, Conn.), InCord (East Haddam, Conn.), and others that market rack guard systems use different kinds of barriers and attachment hardware. For example, Sinco/Sala uses a nylon mesh that is stretched inside a perimeter frame of taught wire rope. So-called EZ-clips are used to attach the netting to the wire rope frame. InCord markets their SURE-GARD™ synthetic mesh that is able to stretch under load. A variety of mesh-size openings are offered for a range of contained item types and sizes.
A MEZZNET-DEFENSE-SYSTEM™ marketed by BayNets (East Haddam, Conn.) raises and lowers flexible netting hung from a rod that is guided up and down by a pair of side posts. Open-sided mezzanines with these systems are accessed by operating a cable and pulley stem that connects to the rod and runs inside the two side posts. The cable and pulleys can be manually cranked, or powered by an electric motor. BayNets' advertising literature suggests that these systems meet federal Occupational Safety and Health Administration (OSHA) fall-protection standards.
SUMMARY OF THE INVENTION
Briefly, a pallet rack safety netting embodiment of the present invention comprises two parallel horizontal wire ropes that are stretched along the top and bottom edges of a shelf opening. A pair of hung left and right screens of flexible netting are attached between the top and bottom wire ropes so that they can be horizontally separated at the middle of the shelf opening. The inside vertical edges of each screen are finished with a metal bar and a clasp so the screens can be latched together at the middle. The outside left and right edges of the screens are secured to the outside of the shelf opening. If used on a top shelf that has no supports at each side of the opening, a pair of support posts are included that hold aloft the top horizontal wire rope. A network of stays and guys are used to reinforce each such post.
An advantage of the present invention is that a safety netting is provided that is effective.
Another advantage of the present invention is that a safety netting is provided that is easy to install.
A further advantage of the present invention is that safety netting systems are provided that are simple to operate.
REFERENCES:
patent: 2761150 (1956-09-01), Kellogg
patent: 3724527 (1973-04-01), Johns
patent: 4981225 (1991-01-01), Cole
patent: 5170829 (1992-12-01), Duncan et al.
patent: 5573125 (1996-11-01), Denny
patent: 5601198 (1997-02-01), Reed
patent: 5778955 (1998-07-01), Chen
patent: 5791501 (1998-08-01), Baldwin, Jr.
patent: 6068085 (2000-05-01), Heilman et al.
Sinco/Sala, “Rack and Conveyor Guarding Systems”,Sinco/Sala, Middletown, Connecticut, USA.
Internationl Cordage East, “Protect Your Gross With Our Net”, InCord, East Haddam, Connecticut, USA.
Bay Nets Safety System, “MezzNet Defense System”, BayNets East Haddam, Connecticut, USA.
Harris Erica B.
Stodola Daniel P.
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